#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define NAME "wr"
int main()
{
  char *own=getenv("USER");
  if(strcmp(own,NAME)==0)
  {
    printf("这个程序已经被执行啦\n");
  }
  else{
   printf("Permission denied\n");
  }
return 0;
}
